NOAA/ESRL/PSD Catalog http://esrl.noaa.gov/psd/thredds/catalog/Datasets/ncep.reanalysis.derived/spectral/catalog.html

Dataset Size Last Modified
     Folder  spectral   --
         chi.day.ltm.nc 65.88 Mbytes 2010-10-25T20:59:51Z
         chi.mon.ltm.nc 1.735 Mbytes 2010-10-25T20:59:52Z
         chi.mon.mean.nc 283.0 Mbytes 2013-05-02T23:04:47Z
         Folder  daily/   --
         div.mon.ltm.nc 1.735 Mbytes 2010-10-25T20:59:52Z
         div.mon.mean.nc 76.09 Mbytes 2011-06-02T21:25:13Z
         psi.day.ltm.nc 65.88 Mbytes 2010-10-25T20:59:55Z
         psi.mon.ltm.nc 1.735 Mbytes 2010-10-25T20:59:57Z
         psi.mon.mean.nc 283.0 Mbytes 2013-05-02T23:04:56Z
         vor.mon.ltm.nc 1.735 Mbytes 2010-10-25T20:59:57Z
         vor.mon.mean.nc 76.09 Mbytes 2011-06-02T21:25:24Z

NOAA/ESRL/PSD at NOAA ESRL PSD see Info
THREDDS Data Server [Version 4.3.15 - 20121218.1126] Documentation